[js-perf-test] Add Array.p.find microbenchmarks

Bug: chromium:791045, v8:1956, v8:7165
Change-Id: I5c5cf74376f61f71591a8c67fbc9d1584a2b9128
Reviewed-on: https://chromium-review.googlesource.com/807748
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49864}

test/js-perf-test/Array/find.js

@@ -0,0 +1,105 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+function benchy(name, test, testSetup) {
+  new BenchmarkSuite(name, [1000],
+      [
+        new Benchmark(name, false, false, 0, test, testSetup, ()=>{})
+      ]);
+}
+
+benchy('NaiveFindReplacement', NaiveFind, NaiveFindSetup);
+benchy('DoubleFind', DoubleFind, DoubleFindSetup);
+benchy('SmiFind', SmiFind, SmiFindSetup);
+benchy('FastFind', FastFind, FastFindSetup);
+benchy('GenericFind', GenericFind, ObjectFindSetup);
+benchy('OptFastFind', OptFastFind, FastFindSetup);
+
+let find_array;
+// Initialize func variable to ensure the first test doesn't benefit from
+// global object property tracking.
+let find_func = 0;
+let find_result;
+const find_array_size = 100;
+const find_max_index = find_array_size - 1;
+
+// Although these functions have the same code, they are separated for
+// clean IC feedback.
+function DoubleFind() {
+  find_result = find_array.find(find_func);
+}
+function SmiFind() {
+  find_result = find_array.find(find_func);
+}
+function FastFind() {
+  find_result = find_array.find(find_func);
+}
+
+// Make sure we inline the callback, pick up all possible TurboFan
+// optimizations.
+function RunOptFastFind(multiple) {
+  // Use of variable multiple in the callback function forces
+  // context creation without escape analysis.
+  //
+  // Also, the arrow function requires inlining based on
+  // SharedFunctionInfo.
+  find_result = find_array.find((v, i, a) => v === `value ${multiple}`);
+}
+
+// Don't optimize because I want to optimize RunOptFastFind with a parameter
+// to be used in the callback.
+%NeverOptimizeFunction(OptFastFind);
+function OptFastFind() { RunOptFastFind(find_max_index); }
+
+function NaiveFind() {
+  let index = -1;
+  const length = find_array == null ? 0 : find_array.length;
+
+  for (let index = 0; index < length; index++) {
+    const value = find_array[index];
+    if (find_func(value, index, find_array)) {
+      find_result = value;
+      break;
+    }
+  }
+}
+
+function GenericFind() {
+  find_result = Array.prototype.find.call(find_array, find_func);
+}
+
+function NaiveFindSetup() {
+  // Prime NaiveFind with polymorphic cases.
+  find_array = [1, 2, 3];
+  find_func = (v, i, a) => v === find_max_index;
+  NaiveFind();
+  NaiveFind();
+  find_array = [3.4]; NaiveFind();
+  find_array = new Array(10); find_array[0] = 'hello'; NaiveFind();
+  SmiFindSetup();
+  delete find_array[1];
+}
+
+function SmiFindSetup() {
+  find_array = Array.from({ length: find_array_size }, (_, i) => i);
+  find_func = (value, index, object) => value === find_max_index;
+}
+
+function DoubleFindSetup() {
+  find_array = Array.from({ length: find_array_size }, (_, i) => i + 0.5);
+  find_func = (value, index, object) => value === find_max_index + 0.5;
+}
+
+function FastFindSetup() {
+  find_array = Array.from({ length: find_array_size }, (_, i) => `value ${i}`);
+  find_func = (value, index, object) => value === `value ${find_max_index}`;
+}
+
+function ObjectFindSetup() {
+  find_array = { length: find_array_size };
+  for (let i = 0; i < find_array_size; i++) {
+    find_array[i] = i;
+  }
+  find_func = (value, index, object) => value === find_max_index;
+}

test/js-perf-test/Array/run.js

@@ -13,6 +13,7 @@ load('some.js');
 load('reduce.js');
 load('reduce-right.js');
 load('to-string.js');
+load('find.js');
 
 var success = true;
 

test/js-perf-test/JSTests.json

@@ -380,7 +380,7 @@
       "main": "run.js",
       "resources": [
         "filter.js", "map.js", "every.js", "join.js", "some.js",
-        "reduce.js", "reduce-right.js", "to-string.js"
+        "reduce.js", "reduce-right.js", "to-string.js", "find.js"
       ],
       "flags": [
         "--allow-natives-syntax"
@@ -422,7 +422,13 @@
         {"name": "SmiToString"},
         {"name": "StringToString"},
         {"name": "SparseSmiToString"},
-        {"name": "SparseStringToString"}
+        {"name": "SparseStringToString"},
+        {"name": "NaiveFindReplacement"},
+        {"name": "DoubleFind"},
+        {"name": "SmiFind"},
+        {"name": "FastFind"},
+        {"name": "GenericFind"},
+        {"name": "OptFastFind"}
       ]
     },
     {